High low is simple. The dealer deals a single card, and you try to predict whether the next card is higher in value, or lower in value. The trick is that you do this in a string… you pay more than the first “success” (or couple of successes, depending on house rules) can give you, and you can “cash out” at any time… each success raising how much you’ll get back more and more, but when you lose, you lose.